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Table 1 Patient demographics by BMI classification

From: Does body mass index influence improvement in patient reported outcomes following total knee arthroplasty? A retrospective analysis of 3918 cases

 

18.5–25 kg/m2

25.01–30 kg/m2

30.01–40 kg/m2

> 40 kg/m2

P-value

n = 409

n = 1170

n = 1875

n = 464

Age (years)

69.8 [27: 89]

68.5 [28: 90]

65.6 [28: 92]

61.7 [34: 85]

< 0.001

BMI (kg/m2)

22.7 ± 1.69

27.7 ± 1.42

34.4 ± 2.77

43.8 ± 4.51

< 0.001

Sex

 Female

308 (75.3%)

653 (55.8%)

1218 (65.0%)

343 (73.9%)

< 0.001

 Male

101 (24.7%)

517 (44.2%)

657 (35.0%)

121 (26.1%)

Race

 White

286 (69.9%)

744 (63.6%)

1068 (57.0%)

278 (59.9%)

< 0.001

 African American (Black)

34 (8.3%)

153 (13.1%)

399 (21.3%)

109 (23.5%)

 Asian/Pacific Islander

33 (8.1%)

82 (7.0%)

55 (2.9%)

11 (2.4%)

 Other

56 (13.7%)

191 (16.3%)

353 (18.8%)

66 (14.2%)

Smoking status

 Current

14 (3.4%)

61 (5.2%)

105 (5.6%)

21 (4.5%)

0.443

 Former

156 (38.1%)

464 (39.7%)

720 (38.4%)

194 (41.8%)

 Never

239 (58.4%)

643 (55.0%)

1045 (55.7%)

248 (53.4%)

  1. Bold indicates statistical significance
  2. BMI body mass index